| http://www.w3.org/ns/prov#value | - A multilayer film including an optical stack comprising layers of a semi-crystalline polymer having an average thickness of not more than 0.5 microns and layers of a second polymer having an average thickness of not more than 0.5 microns wherein said optical stack has been stretched in at least one direction to at least twice that direction's unstretched dimension, said optical stack having first
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